Between Silk and Cyanide: A Codemaker's War, 1941-1945

The Winter Fortress: The Epic Mission to Sabotage Hitler’s Atomic Bomb

The Spy Who Loved: The Secrets and Lives of Christine Granville

Operation Sea Lion

Winston Churchill's Toyshop: The Inside Story of Military Intelligence (Research)

The Secret Lives of Codebreakers: The Men and Women Who Cracked the Enigma Code at Bletchley Park

Last Hope Island: Britain, Occupied Europe, and the Brotherhood That Helped Turn the Tide of War

Agent 110: An American Spymaster and the German Resistance in WWII

Wolves at the Door: The True Story Of America's Greatest Female Spy

Women Heroes of World War II: 26 Stories of Espionage, Sabotage, Resistance, and Rescue (Women of Action)